Method of assembling spring structures



March 18, 1930. g, BRANDT 1,751,072

METHOD OF ASSEMBLING SPRING STRUCTURES Filed May 17, 1928 T' 5 INVENTOR7 aa/m d fiiw/rdf I Patented Mar. 18, 1930 UNITED STATES --FATE 6 OFFICEGUSTAV o. BRANDT, OF DETROIT, MICHIGAN, AssIenon T 'L. VAFYOUNGYSPRING &

WIRE CORPORATION, 013 DETROIT, MICHIGAN METHOD OF ASSEMBLING SPRINGSTBUCTIIRE S Application filed. May 17,

The main object of this invention is to provide a method of assemblingspring structures in which coiled spring tie members are connected tothe coacting parts, such as body springs, in a manner preventingrelative movement thereof.

A further object is to provide a method having these advantages whichresults in economy in forming and assembling the parts.

Objects pertaining to details and economies of my improved method ofassembling spring structures will definitely appear from the detaileddescription to follow. The invention is defined in the claims.

A structure by means of which I carry out my improved method ofassembling spring structures is clearly illustrated in the accompanyingdrawing, in which:

1 Fig. 1 is a fragmentary side elevation of a spring structure assembledin accordance with my improved method.

Fig. 2 is a fragmentary view of an assembling or clip applying toolwhich I preferably employ in my improved method, the

same being partially in longitudinal section on line 22 of Fig. 3.

Fig. 3 is a transverse section on line 33 of Fig. 2.

Fig. 4 is a fragmentary plan view of one of the tie members employed byme.

Fig. 5 is a fragmentary plan view of one of the tie members as it wouldappear after the olfset has been formed therein during the assemblingoperation.

Fig. 6 is a perspective view of a modified form of clip which may beemployed in lieu of the wire clip shown in Figs. 1, 2 and 3.

' The assembled structure in the embodiment illustrated comprises doublehelically coiled 0 body springs 1 and connecting top and bottom crosstie members 2. These tie members 2 are coiled springs having coils ofuniform diameter.

The tie members are arranged in tangential relation to the springs andsecured thereto by means of clips 3 which are formed of wire and arepreferably those such as shown in my co-pending application for LettersPatent fi lzed concurrently herewith, Serial No. 27 8,-

1928; Serial No. 278,578.

a tool designated generally by the numeral 4 which is also the subjectmatter of an application'for Letters Patent SerialNo. 278,57 5 filedconcurrently herewith :and is. described in detail'in such application.Thisitool is provided with jaw members 5'having opposed jaws with curvedfaces 6, one of the jaws having forwardly projecting shoulders 7 whichlie at the outside of. the planes ofthe sides of the coacting jaw sothat, when the jaws are closed to close the clip, the portion 8-of'thetie member embraced by the clip is laterally offset. as shown in Fig. 3,thereby providing shoulder-like stops in the tie member pre,-, ventinglongitudinal movement of the clip on the tie member or of the tie memberwithin the clip. r

This simultaneous closing of the clip and offsetting of the tie memberenables the positioning of the springs at any desired point; that is, itis not necessary: that tie members having specially spaced offsets beemployed. Further, the clip is brought into exact" or definite relationto the offset and the parts vary securely retained.

In Fig. 6 I illustrate a sheet metal clip 9 which may be substituted forthe wire clip shown in Figs. 1, 2 and 3.

I have not attempted to illustrate or describe the various forms ofspring structures for the assembly of which my improved method is welladapted, as it is believed that this disclosure will enable thoseskilled in the art to embody or adapt my improvements as may be desired.

Havingthus described my invention'what spring, and closing the clipuponthe parts and simultaneously offsetting the portion of the coiled springtie member embraced by the clip providing shoulders therein at each ofthe clip.

2. The method of assembling coiled spring side tie members having coilsof uniform diameter and coacting parts of a spring structure consistingof positioning the coiled spring tie member in juxtaposition to thecoacting part, applying a clip adapted to embrace both the coiled springtie member and such coacting part, and closingthe clip andsimultaneously offsetting the portion of the coiled spring tie memberembraced by the clip thereby providing stop shoulders at each sideof'the clip preventing longitudinal movement of the tie member ithin theclip.

' 3; The method of assembling coiled body springs and coiled spring tiemembers consisting of positioning a coiled spring tie member intangential juxtaposition to a coil of a body spring, applying a clipadapted to embrace both the coiled spring tie member and the coil of thebody spring; and closing the clip upon the parts and simultaneously ofisetting a portion of the coiled spring tie member embraced by the clip.

4. The method of connecting coiled spring members and coacting partsconsisting of positioning the coiled spring member injuxtaposition tothe coacting part, applying a clip adapted to embrace both the coiledspring member and such coacting part, closing the clip andsimultaneously offsetting the portion of the coiled spring memberembraced by the clip. V r

In witness whereof I have hereunto set my hand;

GUSTAV o. BRANDT.

